package com.tanhua.server.service;

import cn.hutool.core.collection.CollUtil;
import com.tanhua.autoconfig.template.OssTemplate;
import com.tanhua.commons.utils.Constants;
import com.tanhua.dubbo.api.MovementApi;
import com.tanhua.dubbo.api.UserInfoApi;
import com.tanhua.dubbo.api.VisitorsApi;
import com.tanhua.model.domain.UserInfo;
import com.tanhua.model.mongo.Movement;
import com.tanhua.model.mongo.Visitors;
import com.tanhua.model.vo.ErrorResult;
import com.tanhua.model.vo.MovementsVo;
import com.tanhua.model.vo.PageResult;
import com.tanhua.model.vo.VisitorsVo;
import com.tanhua.server.exception.BusinessException;
import com.tanhua.server.interceptor.UserHolder;
import org.apache.commons.lang.StringUtils;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class MovementsService {

    @Autowired
    private OssTemplate ossTemplate;

    @DubboReference
    private MovementApi movementApi;

    @DubboReference
    private VisitorsApi visitorsApi;

    @DubboReference
    private UserInfoApi userInfoApi;

    @Autowired
    private RedisTemplate<String, String> redisTemplate;

    @Autowired
    private UserInfoService userinfoService;

    //发布动态
    public void publishMovement(Movement movement, MultipartFile[] imageContent) throws IOException {
        //1、判断发布动态的内容是否存在
        if (StringUtils.isEmpty(movement.getTextContent())) {
            throw new BusinessException(ErrorResult.contentError());
        }
        //2、获取当前登录的用户id
        Long userId = UserHolder.getUserId();
        //3、将文件内容上传到阿里云OSS，获取请求地址
        List<String> medias = new ArrayList<>();
        for (MultipartFile multipartFile : imageContent) {
            String upload = ossTemplate.upload(multipartFile.getOriginalFilename(), multipartFile.getInputStream());
            medias.add(upload);
        }
        //4、将数据封装到Movement对象
        movement.setUserId(userId);
        movement.setMedias(medias);
        //5、调用API完成发布动态
        movementApi.publish(movement);
    }

    //查询个人动态
    public PageResult findMyMovementsByUserId(Long userId, Integer page, Integer pagesize) {
        //1、根据用户id，调用API查询个人动态内容（PageResult  -- Movement）
        PageResult pr = movementApi.findMyMovementsByUserId(userId, page, pagesize);
        //2、获取PageResult中的item列表对象
        List<Movement> items = (List<Movement>) pr.getItems();
        //3、非空判断
        if (items == null) {
            return pr;
        }
        //4、循环数据列表
        UserInfo userInfo = userInfoApi.findById(userId);
        List<MovementsVo> vos = new ArrayList<>();
        for (Movement item : items) {
            //5、一个Movement构建一个Vo对象
            MovementsVo vo = MovementsVo.init(userInfo, item);
            vos.add(vo);
        }
        //6、构建返回值
        pr.setItems(vos);
        return pr;
    }

    // 查询好友动态
    public PageResult findFriendMovements(Integer page, Integer pagesize) {
        //1. 获取当前用户id
        Long userId = UserHolder.getUserId();
        //2. 查询数据列表
        List<Movement> items = movementApi.findFriendMovements(userId, page, pagesize);
        return getPageResult(page, pagesize, items);
    }

    //构造返回值方法
    private PageResult getPageResult(Integer page, Integer pageSiz, List<Movement> items) {
        if (CollUtil.isEmpty(items)) {
            return new PageResult();
        }
        //4. 获取好友用户id
        List<Long> userIdS = CollUtil.getFieldValues(items, "userId", Long.class);
        //5、循环数据列表
        Map<Long, UserInfo> userMaps = userInfoApi.findByIds(userIdS, null);
        List<MovementsVo> vos = new ArrayList<>();
        for (Movement item : items) {
            //6、一个Movement构建一个Vo对象
            UserInfo userInfo = userMaps.get(item.getUserId());
            MovementsVo vo = MovementsVo.init(userInfo, item);
            // 修复点赞状态的bug，判断hashKey是否存在
            String key = Constants.MOVEMENTS_INTERACT_KEY + item.getId().toHexString();
            String hashKey = Constants.MOVEMENT_LOVE_HASHKEY + UserHolder.getUserId();
            if (redisTemplate.opsForHash().hasKey(key, hashKey)) {
                vo.setHasLiked(1);
            }
            String lovehashKey = Constants.MOVEMENT_LOVE_HASHKEY + UserHolder.getUserId();
            if (redisTemplate.opsForHash().hasKey(key, lovehashKey)) {
                vo.setHasLoved(1);
            }
            vos.add(vo);
        }
        //构造pageresult并返回
        return new PageResult(page, pageSiz, (int) 0L, vos);
    }

    //查询推荐动态
    public PageResult findRecommendMovements(Integer page, Integer pageSize) {
        // 从redis中获取推荐数据
        String redisKey = Constants.MOVEMENTS_RECOMMEND + UserHolder.getUserId();
        // 判断推荐数据是否存在
        String redisValues = redisTemplate.opsForValue().get(redisKey);
        List<Movement> list = Collections.EMPTY_LIST;
        //如果不存在,调用api随机构造10条动态
        if (StringUtils.isEmpty(redisValues)) list = movementApi.randomMovements(pageSize);
        else {
            //如果存在，处理pid数据
            String[] values = redisValues.split(",");
            //判断当前页的起始条目数是否小于数组总数
            if ((page - 1) * pageSize < values.length) {
                List<Long> pids = Arrays.stream(values)
                        .skip((page - 1) * pageSize)
                        .limit(pageSize)
                        .map(e -> Long.valueOf(e))
                        .collect(Collectors.toList());
                //调用Api，根据pid数据查询动态数据
                list = movementApi.findMovementsByPids(pids);
            }
        }
        //调用公共方法构造返回值
        return getPageResult(page, pageSize, list);


    }

    //查询单条动态
    public MovementsVo findMovementById(String movementId) {
        //调用api根据id查询动态详情
        Movement movement = movementApi.findMovementById(movementId);
        //转化vo对象
        if (movement == null) {
            return null;
        } else {
            UserInfo userInfo = userInfoApi.findById(movement.getUserId());
            return MovementsVo.init(userInfo, movement);
        }
    }

    //首页-访客列表
    public List<VisitorsVo> queryVisitorsList() {
        //1、查询访问时间
        String key = Constants.VISITORS_USER;
        String hashKey = String.valueOf(UserHolder.getUserId());
        String value = (String) redisTemplate.opsForHash().get(key, hashKey);
        Long date = StringUtils.isEmpty(value) ? null : Long.valueOf(value);
        //2、调用API查询数据列表 List<Visitors>
        List<Visitors> list = visitorsApi.queryMyVisitors(date, UserHolder.getUserId());
        if (CollUtil.isEmpty(list)) {
            return new ArrayList<>();
        }
        //3、提取用户的id
        List<Long> userIds = CollUtil.getFieldValues(list, "visitorUserId", Long.class);
        //4、查看用户详情
        Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);
        //5、构造返回
        List<VisitorsVo> vos = new ArrayList<>();
        for (Visitors visitors : list) {
            UserInfo userInfo = map.get(visitors.getVisitorUserId());
            if (userInfo != null) {
                VisitorsVo vo = VisitorsVo.init(userInfo, visitors);
                vos.add(vo);
            }
        }
        return vos;
    }

    //根据id查询
    public MovementsVo findById(String movementId) {
        //1、调用api根据id查询动态详情
        Movement movement = movementApi.findMovementById(movementId);
        //2、转化vo对象
        if (movement != null) {
            UserInfo userInfo = userInfoApi.findById(movement.getUserId());
            return MovementsVo.init(userInfo, movement);
        } else {
            return null;
        }
    }

}